Verses with the word hornet in the Old Testament (2 verses):

Deuteronomy 7:20
Moreover the LORD thy God will send the hornet among them, until they that are left, and hide themselves from thee, be destroyed.

Joshua 24:12
And I sent the hornet before you, which drave them out from before you, even the two kings of the Amorites; but not with thy sword, nor with thy bow.